哪位大侠给分析一下 strace 输出

hua_xg

suse linux 下 一个c 程序，启动后用 strace -f -p 跟踪了一下，本来程序启动应该只有2个线程，可输出说有8个，不知道那些线程是怎么回事，哪位高人给指点一二
输出是：
strace -f -p 7314
Process 7321 attached with 8 threads - interrupt to quit
[pid  7314] time( <unfinished ...>
[pid  7315] read(7,  <unfinished ...>
[pid  7316] futex(0x80d5204, FUTEX_WAIT, 3, NULL <unfinished ...>
[pid  7317] futex(0x80d5204, FUTEX_WAIT, 3, NULL <unfinished ...>
[pid  7318] futex(0x80d5204, FUTEX_WAIT, 3, NULL <unfinished ...>
[pid  7319] poll( <unfinished ...>
[pid  7320] accept(6,  <unfinished ...>
[pid  7321] setup( <unfinished ...>
[pid  7314] <... time resumed> NULL)    = 1220428832
[pid  7314] stat64("/etc/localtime", {st_mode=S_IFREG|0644, st_size=165, ...}) = 0
[pid  7314] uname({sys="Linux", node="linux", ...}) = 0
[pid  7314] write(5, "Sep 03 16:00:32 linux: src/sigha"..., 82) = 82
[pid  7314] rt_sigtimedwait([HUP INT TERM],  <unfinished ...>

linuxosa

pthread library 也会启动一些线程

hua_xg

哦，明白了，strace 挖的还挺深，谢了~~~